Give where the need is greatest
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Mostly cloudy and humid
A couple of showers
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of sunlight, then sets at
of moolight, then sets at
Nov 12, 2012; 5:00 AM ET
The UV index has been around since the early 1990s. It was created to help you plan outdoor activities in hopes to limit overexposure to the sun. Jeannette Calle has more.